Baltic GNSS Jamming Persists

GdanskSatellite navigation was jammed here on 63% of August days.

Ships, aircraft and mobile timing signals along Poland’s coast now treat GPS as unreliable.

A GPS signal arrives faint from 20,000km away, so a modest ground transmitter easily drowns or spoofs it.

Poland’s aviation authority has traced past interference to Russian territory; the source of August’s jamming is unnamed.

Sources: European Spaceflight